Fuel-pump.



G. D. PUGUE.

FUEL PUMP. APPLICATION FILED DEC. 21.1915.

Patented ma; 5, 1916.

GEORGE D. IBOGUE, OF ST. LOUIS, MISSOURI.

. FUEL-PUMP.

Specification of Letters Patent.

Patented Dec. 5, 1916.

Application filed December 21, 1915. Serial No. 68,085.

To all whom it may concern Be it known that I, GEORGE D. Poona,

a citizen of the United States, residing at structed that it can-be repaired quickly, in

case the valves of the pump become defective or inoperative. To this end I have devised a pump in which the inlet and discharge valves are carried by a member separate and distinct from the cylinder of the pump that can be removed and replaced easily by a similar valve-carrying member whenever the valves get out of order. In a multi-cylinder pump the inlet and discharge valves of the respective cylinders are carried by separate valve units or members, each of which can be removed ordisconnected from its cooperating cylinder without disturbing the other valve units or affecting the operation of the remaining cylinders of the pump. Figure 1 of the drawings is a vertical sectional view of a multi-cylinder fuel pump constructed in accordance with my invention. Fig. 2 is a front -elevational View of same. Fig. 3 is a horizontal sectional view, taken on the line 3 3 of Fig. 2. Fig.4 is a detail sectional view, illustrating the elastic gasket that is arranged between each valve unit and the body portion of the pump; and Fig. 5 is a perspective view of the cylinder casting or body portion of the pump in which the cylinders are formed.

Referring to the drawings, which illustrate the preferred form of my invention, A designates the cylinder casting or body portion of the pump in'which the cylinders l are formed, the pump herein illustrated being provided with three cylinders. Each cylinder is provided with an inlet-valve 2 and with one or more discharge valves 3, and the valves of the respective cylinders are carried by separate and distinct valvecarrying members or valve units B that are detachably connected to the body portion A of the pumpf It is immaterial, so far as my broad idea is concerned, how the removable valveunits B are constructed, or how they are combined with the portion of the pump in which the cylinders are formed. It is also'immaterial whether the pump is provided with a single cylinder or a plurality of cylinders, for my broad idea consists in a pump having a cylinder, suitable valves of any preferred type for governing the inlet and discharge of the medium being pumped into and out of the cylinderand a removable member that carries said valves and which is adapted'to be removed whenever the valves become defective or inoperative and a similar member equipped with perfect valves.

substituted therefor.

In the form of my invention herein illustrated each of the removable valve units B is composed of a casing 4, preferably of cylindrical shape, an inlet valve 2 and one or more discharge valves 3 arranged inside of said casing and removable cages or seats 2 and 3' in said casing for said inlet and discharge valves, respectively. for the-inlet valve rests on a shoulder 5 formed on the casing 4, and said valve seat is provided with a tubular portion 2* that projects downwardly through a hole in the lower end portion of the casing 4, as shown in Fig. 1, the lower end of said hole being closed by a solid, externally screw-threaded plug 2 on which a nut 6 is mounted in such a'manner that it bears against the lower end of the casing 4. Consequently, whenever the nut 6 is tightened, the valve seat 2 will be drawn tightly into engagement with the shoulder-5 on which it rests. The valve seat 3 for the bottom discharge valve 3 rests on a shoulder 7 on the inside of the casing 4, but the seat 3 for the upper discharge valve is mounted directly upon the upper edge of the seat 3 for the bottom discharge valve, as shown in Fig. 1. Astop member 8 that limits the upward movement of the upper discharge valve rests upon the upper edge of the seat 3 for said valve, and means is p1-ovidedfor exerting downward pressure The seat 2*" I charge duct12'and the combined inlet and ,joint, said cap bearing upon the upper edge of the caslng 4.

In thepump herein shown the cylinder casting A is provided with a supply manifold 11, from which the supply for all of the cylinders 1 is drawn. ducts 12 are formed in the cylinder casting, for the respective cylinders, however, and eachcylinder 1 is provided in its side with a combined inlet and discharge orifice 13 through which the medium being pumped is drawn into the cylinder and discharged therefrom. The removable valve units B are arranged at the front side of the cylinder casting A and the casing ,4 of each of said valve units is provided at its rear side with three ports 11, 12 and 13 that cooperate, respectively, with an opening 11 in the supply manifold and with the disdischarge orifice 13 of the cylinder with which said valve unit cooperates. .Gaskets are arranged between the removable valve units .B and the cylinder casting A at the.

points where the cooperating ports or openings in said members are formed, and means is provided for securely clamping said yalve units to the cylinder casting. Any suitable I means may be used toretainthevalve units inoperative position, but I prefer to provide the cylinder-casting with a forwardly-proj ecting yoke 14 that has three holes or openings 15 for receiving the valve units B, said openings 15 being so proportioned that the sides'of each opening bear snugly against the opposite sidefaces of the valve unit B arranged inside of same. The openings 15 area trifle longer than the external diameter of the casings 4 of the'valve units, and the yoke-shaped portion 14 on the cylinder casting is made thick enough to overcome any tendency for the valve units to twist or turn out of *vertical alinement with each other,- thus insuring proper alin'ement of the cotiperating ports in the valve units'and in the cylinder casting. The valve units B are forced rearwardly toward the cylinder casting A by means of set screws 16 or other suitable devices that are mounted in screwthreaded openings 16*, in the cross piece of the yoke 14 on the cylinder casting. The yoke portion 14 is preferably so arranged that each of. the adjustable clamping devices 16 in same will exert pressure on its cooperating valve unit B at a point intermediate the ports 12 and 13 in the rear side of said valve unit, thus permitting two metal gaskets 17 of the same thickness to be used for packing the joints around the ports 12, 12 and 13, 18 An elastic gasket 18 that is thicker than the gasket 17 and which is formed from leather or some other suitable material that has more or less resiliency,is

Separate dischargeand the ports 11 in the cylinder casting,

said gaskets 18 having sufhcient resiliency to '7 insure tight joints around the ports re ferred to, notwithstanding the fact that the clamping devices 16 which retain the valve units in position are arranged some distance abovethe gaskets 18. In other words, the valve units are clamped to the cylinder casting in such a manner that two of the gaskets of each unit will be subjected to the same clamping pressure, and the third gasket of each valve unit is of such a character that it will be sure to form a tight joint if the joints of the other two ,gaskets are tight. The cylinder casting and the casings 4 of the valve units are preferably provided with recesses or depressions for receiving the gaskets 17 and 18, as shown clearly in Fig. 1. The tubular-shaped portion 2 of the valve seat 2 is provided at its lower end with [slots or openings, as shown in Fig. 1, so as to permit the medium being pumped to pass into said tubular-shaped portion, and the stop member 8 that is arranged above the upper discharge valve is provided with a port or opening through which the medium passes in escaping from the casing of the valve unit into the discharge duct 12 in the cylinder casting.

In order that the valve unit of one cylinder may be removed without stopping the pump or affecting the operation of the other cylinders, I have provided the pump with three separate and distinct manually-operable valves 19 for closingthe openings 11 leading from the supply manifold 11 to the inlet ports 11 of the valve units. As shown in Fig. 1, each of the valves 19 is carried by a-stem 20 which is adjustably mounted in a horizontallydisposed guide 21 that is screwed into the rear .side of the cylinder mally, the valves 19 are arranged in the position shown in Fig. I, but whenever it is desired to remove one of the valve units B, the valve 19 that coiiperates with said unit is forced forwardly, by turning the stem 20, so as to close the opening 11 and prevent the contents of the manifold 11 from escaping when the valve unit is removed.

A pump of the construction above described greatly improves the efliciency of an oil enginethat is used for driving an electric generator that supplies current for lighting or power or an oil engine that is used in a municlpal water works plant, owing to the fact that the valves of the respective cylinders are carried by separate removable valve-carrying members. In case the valves of one cylinder become defective or inoperative, the valve unit of said cylinder can be removed easily and another valve unit equipped with perfect valves can be substituted therefor.

It is not necessary to disconnect any pipes in the operation of removing any of the valve units, for the pump is so designed that the removal of a valve unit and the subst1tution of a valve unit provided with perfect valves can be eflectedby simply loosening a set screw, slipping the worn valve unit out of its yoke, replacing it with a perfect valve unit and thereafter tightening the set screw. 1f the pump is a multi-oylinder pump, as herein illustrated, the valve unit of one cylinder can be removed and another valve unit substituted therefor without stopping the 1. A pump, comprising a member in which a cylinder is formed,-said member having a supply duct and a discharge duct, a port in one side of said cylinder, a removable valve unit combined with said member and pro vided at one side with ports that register with the ducts in said member and with the port in said cylinder, and gaskets arranged between said valve units-and said member, one of said gaskets being formed of material that has a greater degree of resiliency than the material from which the other gaskets are formed 2. A pump, comprising a cylinder and a removable valve unit equipped with valves that govern the admission and discharge of the medium into and out of said cylinder, and a means for closing the passageway through which the medium being pumped is supplied whenever said valve unit isremoved.

3. A pump, comprising a cylinder provided with a port, a removable valve unit provided with inlet and discharge valves arranged on opposite sides of said port, a supply passageway leading to said valve unit,

and a valve that is adapted to be actuated to close said passageway when said valve unit is removed.

L. A pump, comprising a member in which a cylinder is formed, said member having a discharge duct and a supply passageway, a removable valve unit equipped with inlet and, discharge valves and provided on one side with ports that register with the ports in said cylinder and with the discharge. duct and supply passageway. in said member, and means for preventing the medium being pumped from escaping from the supply passageway in said member when said valve unit is removed.

5. A pump, comprising a member in which a cylinder is formed, a removable valve unit arranged at one side of said member, a portion on said member that receives said valve unit, ahd an adjustable device in said portion for clamping said valve unit in position.

6. A pump, comprising a body portion and a removable valve unit provided with registering ports or openings that are spaced some distanceapart, and a retaining means for said valve unit that exerts pressure on same at a point intermediate said ports.

7 A pump, comprising a member in which a cylinder is formed, a removable valve unit equipped with inlet and discharge valves, a supporting means for said valve unit comprising a portion on said member through which said valve unit can he slipped, andan adjustable device for retaining said valve unit in position.

8. A pump, "comprising a member in which a cylinder is formed, a removable valve unit arranged at one side of said member and provided with inlet and discharge valves that are arranged'in axial alinement with each other and parallel to the longitudinal axis of the cylinder, a supply port and a discharge port arranged adjacent the opposite ends of said valve unit, and a suction manifold in said member with which said supply port -communicates.

9. A pump, comprising a member in which a cylinder is formed, said member being provided with a supply passageway and a .discharge passageway, a port in one side of said cylinder, a removable valve-carrying unit arranged at one side of said member and provided with ports that register with the passageways in said member and the port in said cylinder, a yokeshaped portion on said member that embraces said valve unit, and means for clamping said valve unit tightly against said member.

10. A pump, comprising a member in which a cylinder is formed, said member being provided with a supply passageway and a discharge passageway, a port in one side of said cylinder, a removable valve-carrying unit arranged at one side of said member and provided with ports that register with the passageways in said member and the port in said cylinder, a yokeshaped portion on said member that embraces said valve:

unit, an adjustable clamping device on said iso yoke that exerts pressure on-said valve unit at a-point intermediate two of the ports therein, and gaskets interposed between said member and valve unit, one of said gaskets being formed from material that has more or less resiliency.

11. A multicylinder pump, comprising a member pro ided with a plurality of cylinders, a supply manifold in said me m-. ber common to" all of said cylinders, and

removable valve units for said cylinders ,combinedfwith said member and each being equipped.w ith inlet andfdischa'rge valves forcontrolling'the admission and discharge of the medium into and out of the particulaf cylinder with which said unit coi iperates, "'each-'of said valve units having an. admission port that communicates with the supvided with a-plurality of cylindersand havember;

ply port in said A pump, c mprisinga-member proing a supply manifold, removable valve units forthe respective cylinders equipped 'With suitable inlet and discharge valves, and means wherebyanyv of said-valve units can be removed without-affecting the operation of the remaining valve units or" permitting the medium being'pumped to escape from the manifold.

13. A pump, comprising a member provided with aplurality' of cylinders, a supply manifold in said. member, removable valve units for the respective, cylinders equipped with suitable inlet anddischarge valves, each of said valve units having a port that'registers with a discharge opening in said manifold, and-independent, manually-operable valves for closing the discharge openings in said supply manifold.

14. A removable valve unit for pumps consisting of a casing provided with an end Wall, a valve seat in said casing provided with a tubular portion that has a solid extension which projects through an opening in said end wall, a shoulder inside of said casing on which said valve seat rests, an adin longitudinal alinement with each other, one of said valve seats having a portion that projects through an opening in the end wall of the casing, means arranged outside of said end wall and cooperating with said portion for clamping one of the valve seats against one of said shoulders, and means seats arranged on the inside of said casing arranged at the other end of the casing for clamping the remaining valve seats together. r Y

In testimony whereof I hereunto aflix my signature in the presence of two witnesses, this fifteenth day of December 1915.

7 GEORGE D. POGUE. Witnesses:

VVELLs L. CHURCH, GEORGE BAKEWELL. 

